In my case, it's because I legit did not know that was even a debate or topic of discussion before entering fandom spaces years ago, and even now, with all I have read and learned about the topic, I still don't feel like I have enough proper knowledge or understanding of the topic to really have a strong opinion one way or another. I've no problem with people having preferences or not having preferences, but yeah, I still just stay out of the debates simply 'cause I just don't care one way or another.

Plus, I also agree with the whole obvious thing of it being fiction and it's not that deep and people should do what they personally want with their fics and all that, too.